. >>> recent polls show president obama beating romney by just 1 percentage point in florida. >>> 7:16. the only vice presidential debate of the season takes place tonight in danville, kentucky. alison burns is in our washington, d.c. newsroom with what both candidates are saying about tonight's debate. alison? >> polls show most voters think congressman paul ryan will win tonight's debate. it's at center college in kentucky. ryan admits he's nervous but says he's gonna emphasize the clear differences between the obama and romney campaigns. >> joe biden has been on the stage before. this is my first time. but what he can't run from is president obama's indefensible record. >> biden is much more experienced on the debate stage. he participated in 20 debates in the 2008 debate campaign. he said he's studying on ryan's record an he will make that his focus tonight. >> governor romney has -- i don't want to say anything in the debate that is into the completely accurate. president obama attended martha raddic attended her wedding 20 years ago, some say it's a conflict of interest. the deba